2111316761 has 2 divisors, whose sum is σ = 2111316762. Its totient is φ = 2111316760.

The previous prime is 2111316749. The next prime is 2111316817. The reversal of 2111316761 is 1676131112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1111555600 + 999761161 = 33340^2 + 31619^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2111316761 is a prime.

It is a super-2 number, since 2×2111316761² = 8915316930559062242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2111316161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055658380 + 1055658381.

It is an arithmetic number, because the mean of its divisors is an integer number (1055658381).

Almost surely, 2^2111316761 is an apocalyptic number.

It is an amenable number.

2111316761 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111316761 is an equidigital number, since it uses as much as digits as its factorization.

2111316761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 29.

The square root of 2111316761 is about 45949.0670307896. The cubic root of 2111316761 is about 1282.8753640115.

Adding to 2111316761 its reverse (1676131112), we get a palindrome (3787447873).

The spelling of 2111316761 in words is "two billion, one hundred eleven million, three hundred sixteen thousand, seven hundred sixty-one".